panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff82928c10) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e1b69,ffffffff82833462,90,ffffffff828e7ce1) at __assert+0x29 sys/kern/subr_prf.c:157
uvm_pagealloc_pg(fffffd800637ee80,fffffd8077c0b0f8,1585f1000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695
uvm_pagealloc(fffffd8077c0b0f8,1585f1000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917
pmap_get_ptp(fffffd8077c0b0e8,2b0be35d000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215
pmap_enter(fffffd8077c0b0e8,2b0be35d000,6b19e000,3,21) at pmap_enter+0x2b0
uvm_fault_upper(ffff80002a688e90,ffff80002a688ec8,ffff80002a688d90,0) at uvm_fault_upper+0x26f sys/uvm/uvm_fault.c:1056
uvm_fault(fffffd807676e018,2b0be35d000,0,1) at uvm_fault+0x137 sys/uvm/uvm_fault.c:608
upageflttrap(ffff80002a689010,2b0be35d008) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a689010) at usertrap+0x20e sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7e67b60c95e0, count: 246
End of stack trace.
syncing disks...31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31  giving up

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 1f64d870-06f2-d8bf-7327-adc6877a2997
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27f0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.65
boot> show malloc
boot: illegal argument malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace